Patent US3829544A successfully refreshed from Google Patents.
US3829544A
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US
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Method of making a unitary polycrystalline diamond composite and diamond composite produced thereby
Assignee: Megadiamond Industries Inc
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Filing: 1973-04-02
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Granted: 1974-08-13
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Expires: 1993-04-02
Abstract
Abstract A method of making unitary polycrystalline diamond composite by sintering a body of diamond particles at a temperature between about 1100*-3900*K and at a pressure ranging up to about 170 kilobars depending on the temperature.
Inventors
- 👤 H Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:45
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/065; B01J2203/0655; B01J2203/0675; B01J2203/0685
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
A method according to claim 1 wherein the step b comprises heating said mass to a temperature of about 2440*K and maintaining the pressure at about 85 kilobars.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |